JPH058227Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in the mounting structure of a subframe in a rear suspension.

BACKGROUND ART Conventionally, this type of mounting structure has been designed as shown in FIGS. 3 to 5. That is, code 1
is the rear wheel of a car, and a substantially U-shaped subframe 2 is installed at a location sandwiched between the two rear wheels 1.
A free end of the subframe 2 is connected to the lower surface of two side members 3 extending in the longitudinal direction of the vehicle. The side member 3 has a substantially U-shaped longitudinal section, and is welded to the lower surface of the floor pan 4.
A cushion 16 including an elastic body 5 is fastened at four locations with bolts 6 and nuts 7 on its lower surface. The subframe 2 is fixed to the side member via these cushions. In addition,
Reference numeral 8 indicates a working hole drilled in the floor pan 4 for attaching the bolt 6. Further, the reference numeral 17 is a bolt for fixing the seat belt anchor, and there is a reinforcement (hereinafter referred to as R/
F) 18 are provided.

This kind of mounting structure of subframe 2 is based on Jikaisho.
Similar products are also disclosed in Japanese Patent Nos. 57-47486 and 59-93978.

However, since all of the conventional subframes 2 are attached to the lower surface of the side member 3, there are various restrictions on the attachment position of the subframe 2, its dimensions, etc. from the side member side.

On the other hand, there is a system in which the attachment part of the seatbelt anchor fixing bolt is reinforced with a side member and a reinforcing plate, as disclosed in Japanese Utility Model Application Publication No. 17037/1983, but it is difficult to prevent large loads acting on the anchor fixing bolt. is borne only by the floor pan, reinforcing plate, and side members, and other members do not participate in bearing this load. Therefore, in order to prevent the floor pan from deforming when the large load is applied, the reinforcing plate should be made thick. There is a need for a wide-area device, which poses the problem of increased weight.

Problems to be Solved by the Invention In view of the problems of the prior art described above, the present invention has no design restrictions on the mounting position, dimensions, etc. of the subframe, and also reduces the load acting on the seat belt anchor fixing bolt by subframe. The object of the present invention is to provide a subframe mounting structure that can distribute the load among the frame, side members, and brackets for supporting the subframe, and can prevent deformation of the floor pan, the brackets, etc. with a minimum increase in weight.

Means for Solving the Problems In order to solve the above problems, in the present invention, the lower surface 1 of the side member 3 fixed to the floor pan 4 of the vehicle
0, a flange 12 of a bracket 9 for supporting the subframe is fixed, a subframe mounting portion 14 of the bracket 9 extends horizontally from the flange 12, and a flange 13 continuous to the mounting portion 14 is attached to the floor. The seatbelt anchor fixing bolt 17 is fixedly connected to the pan 4, and the seat belt anchor fixing bolt 17 is attached to the joint between the flange 13 and the floor pan 4, and the subframe 2 is supported on the subframe attachment part 14. is adopted.

Effects With this invention, the subframe, seat belt anchor fixing bolts, etc. can be installed without any design restrictions on the mounting position or dimensions of the sub frame relative to the side member, and the seat belt anchor fixing bolts can be placed in a large size. When a load is applied, the load is distributed and borne by the floor pan, bracket, subframe, and side members through the bracket, which minimizes deformation of the floor pan. The rotation moment acting from the bracket side on the connecting portion with the member can also be reduced, and deformation of the bracket can also be prevented.

Embodiment FIG. 1 shows an embodiment of a subframe mounting structure according to the present invention. In FIG. 1, the same reference numerals are used for the same parts as in FIG. 4.

In FIG. 1, numeral 9 is a bracket;
from the lower surface 10 of the side member 3 to the side member 3
It is stretched over and fixed at flanges 12 and 13 up to the attachment part 11 of the seatbelt anchor fixing bolt 17 of the floor pan 4, which is a little further away. This bracket 9 is for attaching the subframe 2, and extends horizontally from the lower surface 10 of the side member 3 toward the center of the vehicle body by a predetermined width, and from there extends in the form of a terrace sloping toward the floor pan 4 side. It is formed. The attachment portion 14 of the subframe 2 is set at a location corresponding to the predetermined width. A cushion 16 including an elastic body 5 is attached to a mounting portion 14 of this bracket 9 with a bolt 6 and a nut 7.
The subframe 2 is elastically supported on the floor pan 4 side via the cushions 16.

The flange 13 of the bracket 9 overlaps with the mounting portion 11 of the anchor fixing bolt 17 of the floor pan 4, where the bolt 17 for fixing the anchor of the rear seat belt (not shown) is provided, and furthermore, the R/F 18 is provided as required. The floor pan 4, the flange 13 and the R/F 18 are connected to each other by welding.

In addition, when the plate thickness of the bracket 9 is increased as shown in FIG. 2, the R/F1 for the anchor is
It is also possible to omit 8.

For this reason, the anchor fixing bolt 1 of the floor pan 4
The mounting portion 11 of 7 is attached to the flange 1 of the bracket 9.
3, and the bracket 9 is reinforced with the subframe 5 and the subframe attachment portion 1 on the side member 3.
4 and the flange 12, so when a large load is applied to the anchor fixing bolt 17, the load is transferred to the flange 13 of the floor pan 4 and bracket 9.
Furthermore, it is transmitted to the bracket 9 itself, the subframe 2, and the side member 3, and is distributed and carried by these members.

Further, since the subframe 2 is supported by the subframe mounting portion 14 of the bracket 9, the degree of freedom in design regarding the arrangement position, size, shape, etc. is increased compared to the case where the subframe 2 is supported directly to the side member 3.

Effects The present invention has the configuration and operation described above, and since the subframe is supported by a bracket fixed between the side member and the floor pan, its attachment in relation to the side member is This has the effect of increasing the degree of freedom in design without being subject to restrictions on position, size, or shape.

In addition, the mounting portion of the seat belt anchor fixing bolt is reinforced by the flange of the bracket, and the bracket is fixed to the subframe and side member, so the large load acting on the anchor fixing bolt is transferred to the floor pan and bracket. , the subframe, and the side members, deformation of the floor pan at the anchor fixing bolt attachment part can be kept to a minimum, and the subframe attachment part of the bracket to which the subframe is supported is
A part of the load is carried by the subframe, which extends horizontally from the flange fixed to the lower surface of the side member and is supported by this part, so that the fixed part between the side member and the bracket is The rotational moment acting on the bracket from the bracket side is also reduced, and it is possible to prevent the bracket from deforming when the load is applied.

Furthermore, since the floor pan, bracket, subframe, side member, etc. constitute a closed cross-sectional structure, it has the effect of significantly increasing the rigidity of the portion of the floor pan where the anchor fixing bolts are attached.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the subframe mounting structure according to the present invention, and is a sectional view similar to FIG.
FIG. 2 is a partial sectional view of another embodiment, FIGS. 3 to 5 show a conventional example, FIG. 3 is a side view of the automobile, and FIG. 4 is a view of the automobile as seen from the arrow in FIG. 3. FIG. 5 is a sectional view taken along the - line in FIG. 4. 1... Rear wheel, 2... Subframe, 3... Side member, 4... Floor pan, 9... Bracket, 10... Bottom surface, 12, 13... Flange, 1
4...Subframe mounting part, 17...Anchor fixing bolt, 18...R/F.

Claims (1)

[Scope of utility model registration request] A flange of a subframe supporting bracket is fixed to the lower surface of a side member fixed to a floor pan of the vehicle, and a subframe attachment portion of the bracket extends horizontally from the flange,
A flange continuous to the attachment portion is fixedly connected to the floor pan, a seat belt anchor fixing bolt is attached to the connection portion between the flange and the floor pan, and a subframe is supported on the subframe attachment portion. Subframe mounting structure for rear suspension.